Finding the Fourth Proportional to 2,217.57, 3,309.50 and 1,971.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,217.57 : 3,309.50 = 1,971.54 : x
2. Step 2: Convert to fraction form
   2,217.57/3,309.50 = 1,971.54/x
3. Step 3: Cross multiply
   2,217.57x = 3,309.50 × 1,971.54
4. Step 4: Simplify right side
   2,217.57x = 6,524,785.22
5. Step 5: Solve for x
   x = 6,524,785.22/2,217.57
6. Step 6: Final answer
   x = 2,942.31